The pulmonary circuit begins at the semilunar valve of the pulmonary trunk that carries deoxygenated blood to the lungs. The pulmonary trunk divides into left and right pulmonary arteries that go to each lung. Blood is oxygenated in capillaries that flow through the alveoli of the lungs. Oxygenated blood is then returned to the left atrium of the heart by four pulmonary veins.
From 1619 to 1776, the representative branch of the legislature of Virginia was the House of Burgesses, which governed in conjunction with a colonial governor and his council. Jamestown remained the capital of the Virginia colony until 1699, when the government was moved to Williamsburg. In 1776 the colony became the independent Commonwealth of Virginia and the House of Burgesses became the House of Delegates.
This democratically elected legislative body was the first of its kind in English North America. From 1619 until 1643, elected burgesses met in unicameral session with the governor and the royally appointed governor's Council; after 1643, the burgesses met separately as the lower house of the. of Virginia.